Heavy-duty telescopic container



Oct. 1, 1957 F. R. BUHRMASTER ETAL 2,808,190

HEAVY-DUTY TELEscoPIc CONTAINER FIGJ.

Oct. 1, 1957 F. R. BUHRMASTER ErAL 2,808,190

HEAVY-DUTY TELEscoPIc CONTAINER Filed July 2e, 1954 2 Sheets-Sheet 2lili United States Patent C) HEAVY-DUTY TELESCOPIC CONTAINER Fred R.Buhrmaster, Webster Groves, and Willard G. Hunt, Ladue, Mo., assignors,by mesne assignments, to Crown Zellerbach Corporation, San Francisco,Calif., a corporation of Nevada Application July 26, 1954, Serial No.445,864

1 Claim. (Cl. 229-23) This invention relates to heavy-duty fullytelescoped vcontainers provided with interior reinforcements to protcctand strengthen the vertical and horizontal corners thereof and to insurehigh stacking strength.

The containers of the invention are primarily designed for the shipmentof nails, bolts, spikes and other heavy commodities. Containers for suchmaterials may be stacked ten to fifteen high during shipment and instorage, consequently, they must -be capable of withstanding acomparatively heavy top load without crushing, distortion or otherdamage. Another requirement is a smooth unobstructed bottom panel freeof cracks, slits or overlapping closure aps. Small nails particularly,tend to work into and through any cracks, slits and the like withresulting hazard to the operators as well as damage to the containeritself.

The keg or container of the persent invention fully meets the vdescribedrequirements and is extremely economical in the use of board. Itcomprises substantially counterpart rectangularly lshaped inner andouter telel scopic sections, each provided with closure flaps on oneend. The bottom section is provided with a U-shaped pad comprising abottom panel coextensive with the inner face of the 'bottom ap closureand a pair of upstanding opposed panels coextensive with a pair ofopposed walls of the bottom section. The free side edges Vof the bottompanel and of the opposed wall panels of the pad are provided withrelatively narrow flanges folded at right angles to the vbottom paneland the opposed wall panels respectively, forming a reinforcement toeach 'horizontal land vertical corner of the section, rigidizing` thestructure and substantially increasing the top load rating of the fullytelescoped container compared to its rating without the reinforcingmember.

The containers are fully collapsible, thereby greatly reducing thewarehouse space required Afor storing same prior to loading, comparedwith the wooden kegs which have been in common use in packing relativelyheavy commodities of 'the class hereinbefore described.

An object of the invention is to provide a collapsible paperboardtelescopic container of high stacking strength adapted for shipping Iandwarehousing nails, bolts, spikes and other relatively heavy articles.

Another object of the invention is to provide a fully telescopedcontainer rectangular -in shape with a U-shaped reinforcing memberfriction-fitted inthe `bottom section of the container to reinforce thevertical and horizontal corners and to provided substantially increasedstacking strength for the telescopedcontainer.

.Another Vobject is to provided a paperboard telescopic keg for shipmentof nails and other relatively heavy commodities comprising top andbottom full telescoping sections each closed at one end, the bottomsection being reinforced by a bottom panel having integral upstandingopposed wall panels in flatwise relation and `coextensive with anopposed pair of walls of the bottom section.

A still further object of the invention is to provide a ICC reinforcingmember for the bottom or inner section of a telescopic container, themember comprising a snugly titting bottom panel positioned atwise overthe bottom flap closure with a pair of opposed upstanding panelsintegral with the bottom pan-el positioned flatwise against opposedwalls of the section and relatively narrow flanges integral with thefree edges of the bottom panel and the free side edges of `theupstanding panels, the bottom flanges being folded at right anglesthereto and the panel flanges at right angles to the panels, thusproviding reinforcements to all corners of the bottom sectionV of thecontainer and substantially increasing the top load of the container inits closed position.

With the above and other objects in view, the invention consists of theconstruction and novel combination and arrangement of parts hereinafterfully described, illustrated in the drawings .and lset forth in theclaims, it being understood that various changes in the form,proportions and details of construction within the scope of the claimsmay be employed without departing from the spirit of the invention andwithout sacrifici-ng any advantages thereof.

In the drawings which form part of Vthe specification, like numeralsVand symbols therein appearing refer to like parts wherever they occur:

Fig. 1 is a plan view of the blank from which the outer section of acontainer embodying a preferred form of the invention is formed;

Fig. 2 is a plan view of the reinforcing member for the innerY sectionof the container;

Fig. 3 is a plan View of the blank from which the inner section of thecontainer is formed;

Fig. 4 is an exploded view in perspective of the rein forcing membererected, ready to Ibe inserted in the inner erected section with theouter erected section positioned to enclose the inner section andreinforcing member;V

Fig. 5 is an exploded View of .the erected bottom section partially cutaway to show the reinforcing member positioned therein and the erectedouter section ready to be telescoped over the inner section;

Fig. 6 is a horizontal sectional view of the inner section shown in Fig.5 taken 'in the direction of the arrows 6-.-6;

Fig. 7 illustrates the fully telescoped container with a portion brokenaway to show the Iposition of the Vinner bottom section;

Fig. 8 is a vertical sectional view of the fully telescoped containershown in Fig. 7 taken in the Ydirection of the arrows 8 8;

Fig. 9 is a vertical sectional View of the container shown in Fig. 8taken in the direction of the arrows 9 9;

Fig. 10 is a horizontal sectional view-of the vcompletely assembledcontainer of Fig. 7 taken in the direction of the arrows l0-10.

The hl-ank for forming the outer telescopic section .of the container isshown at A, Fig. l. Transverse scores 1t) deue the walls 11, 12, 13 and14 of one of the body sections. Alongitudinal score 15 denesthe upperedges of the section walls 'and the inner boundary off closure flaps 16,17, 18Y and 19 which are separated from each other by transverse slots20, 21 and 22. A sealing flap 23 is integral with the section wall 14,the inner edge being denedby transverse score 10. Handhole openings 24and 25 may be cut in walls 13 and 15 if desired. A tear tape, indicated.byV lnumeral 2 6, .may be positioned on the inner rface of the blank Aalong aA longitudinal line immediately above the upper boundaries ofhandholes 24 and 2S.

The blank -for yforming a U-shaped reinforcing pad or member is shown atB, Fig. 2. Longitudinal scores 27 define the side edges of wall panels28 and 29'and bottom panel 30 and the inner boundary of wall flanges 31and bottom panel anges 32. Transverse scores 33 define the endboundaries of panels 28 and 29 and the side edges of the bottom panel39. Slots 34, 35, 36 and 37 separate the anges 31 of the wall panelsfrom the bottom panel flanges 32.

The blank for forming the inner section of the container is shown at C,Fig. 3. The side edges of wall panels 39, 40, 41 and 52 of the sectionsare defined by transverse scores 3S while the ends of the panels aredefined by a longitudinal score 43 which score defines the inner edgesof closure flaps 44, 45, 46 and 47. Slots 48, 49 and 50 separate theclosure flaps 44, 45, 46 and 47 from each other. The inner edge ofsealing iiap 51 is defined by transverse score 38.

The blank A may be conveniently erected by folding the wall panels intotubular form along transverse scores and attaching the flap 23 to theouter face of the free side edge of wall 11 by glue or stitching 52 andthen folding the flaps 16, 17, 18 and 19 into closed position as shownin Fig. 4. The blank B Afrom which the reinforcing member is Iformed maybe erected by folding the wall panels 28 and 29 along the transversescores 33 into right angular relation to the bottom panel 30. The panelflanges 31 are 'folded inwardly along the scores 27 into right angularrelation to the panels 28 and 29 with the entire free end edges 31atightly abutting the inner face of the bottom panel 30, and the free endedges 31b in coplanar relation with the upper free end edges of panels28 and 29. Flanges 32 are folded in right angular relation to the bottompanel 30 with their end portions in atwise relation to the outer face ofthe lower portions of the flanges 31. The erected reinforcing insert isshown in perspective `in Fig. 4 of the drawings.

The blank C for the inner section of the container is folded in the samemanner as described for blank A with the flap 51 glued or stapied to theinner face of the outer edge of panel 42.

Upon the completion of the erection of the blanks A, B and C, thecontainer may be assembled by inserting the reinforcing member B intothe inner Asection C as shown in Fig. 5. In this assembled position thebottom panel 30 and Wall panels 28 and 29 of the member B fit tightlyagainst the bottom closure and one pair of opposed section walls,respectively. The flanges 31 are positioned iiatwise against the otherpair of opposed section walls, forming right angular supporting columns,the end edges 31a of the flanges tightly abutting the inner facey offthe bottom panel 30. rThe outer section A may then be telescoped overthe inner section whereby the free upper edges of the panels 28 and 29and the end edges 31b of anges 31 will be in abutting relation to theinner face of the closure of section A, thus providing a high top loadrating of the container and completing the full assembly thereof shownin Fig. 7.

From the foregoing description and the accompanying drawings it will beseen that in the telescoped position of the inner and outer sections ofthe container, each vertical corner is fully protected and reinforcedthroughout its length by a double thickness of paperboard and the endedges 31a and 31h, respectively, of the iianges of the reinforcingmember, extend from abutting relation with the bottom panel of thereinforcing member to abutting relation with the closure of the outertelescopic section, thereby reinforcing and rigidizing the container andsubstantially increasing the top load rating. The reinforcing memberalso provides a protection to each 0f the horizontal corners of thebottom section and the bottom panel member thereof provides a smooth,uubroken, interior bottom surface.

This construction is especially suitable for paperboard containers orkegs for nails and the like. Small nails in particular tend to penetrateany unprotected joints, corner openings and the like, and ultimatelydamage the container. The hereinbefore described construction provides asmooth, continuous, reinforcing bottom which is very effective inpreventing damage or break down of the container by penetration of nailsor other small articles of hardware during handling and. transportation.

While a preferred embodiment of this invention has been illustrated anddescribed, it should be understood that Various modifications may beemployed without de parting from the scope of the invention as definedin the appended claim.

What l claim as my invention is:

A rectangularly shaped container formed of substantially similar innerand outer fully telescoped sect-ions each closed at one end by closureflaps, a substantially Ushaped reinforcing member positioned within saidinner section, said member comprising a bottom panel with a pair ofopposed upstanding walls integral with opposite edges thereof, thebottom panel being substantially coextensive with the closure of theinner section and said upstanding Walls being substantially coextensivewith the adjacent inner section Walls, a pair of opposed narrowvertically extending flanges coextensive in length and integral witheach of said opstanding Walls folded inwardly at right angles theretoand with vertical edges thereof in spaced alignment with each other, theanges having upper and lower free end edges in a horizontal plane, theflanges being disposed against adjacent Wall portions of the innersection, a horizontally extending flange at each edge of the otheropposed edges of the bottom panel and coextensive in length and integralwith the panel, the anges folded upwardly and with end portions thereofliatwise against the outer face of similar adjacent lower portions ofsaid vertically disposed side wall flanges, the entire upper free edgesof said opstanding wall and the upper horizontal edges of their attachedvertical flanges being in abutting relation with an adjacent surface ofthe inner face of the outer section closure, and the bottom horizontaledges of said vertically disposed wall flanges being in abuttingrelation with an adjacent surface of the inner face of the bottom panelof said reinforcing member, thereby rigidifying the corners andsubstantially increasing the stacking strength whereby when thecontainers are stacked, compression forces are transmitted directly fromthe bottom corners of a superimposed 'container through the cornerportions of a subjacent container directly to the upper edges of theflanges contacting the inner corner surfaces of the closure of the outersection downwardly to and through the lower edges of the iiangescontacting the inner corner surfaces of the bottom panel of thereinforcing member.

References Cited in the tile of this patent -UNITED STATES PATENTS636,930 Great Britain May 10,

